bitarray/map over bitarrays/map! for length 127 @test map!(identity, b, b1) == map!((x->begin #= /cache/build/default-aws-aarch64-ci-1-4/julialang/julia-master/julia-2873cdde7c/share/julia/test/bitarray.jl:1491 =# x end), b, b1) == b1 == b